Petroleum Reservoir Evaluation and Development >
2021 , Vol. 11 >Issue 3: 390 - 394
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2021.03.014
Pilot test of new infinite stage and full-bore sliding sleeve fracturing technology in shale gas wells
Received date: 2020-12-18
Online published: 2021-06-24
Staged fracturing for horizontal wells is one of the key technologies for shale gas development. As the shale gas development in China extends to normal pressure fields, it is urgent to enhance the speed and efficiency of fracturing technology. The existing plug and perf operation technology has many limitations, including long duration of pumping, easiness to stuck tools, limited number of fracturing stages for ball-actuated sliding sleeves, and limited fracturing scale for packers dragged by coiled tubing. For the new infinite stage and full-bore sliding sleeve fracturing technology, the structure principle of the sliding sleeve as well as its technological characteristics are explained, and a pilot test has been carried out in 16 fracturing stages of two wells in Nanchuan Shale Gas Field. This technology replaces perforation and coiled tubing drilling plugs by preset sliding sleeves. All the sliding sleeves are opened successfully. The number of fracturing stages is unlimited and the operation is continuous. The average time of single stage fracturing is 3.5 h and it can finish seven fracturing stages per day. As a fast, safe and efficient staged fracturing technology, it provides a new technical means for enhancing speed and efficiency of fracturing technology for shale gas wells in China.
Key words： infinite stage; full-bore sliding sleeve; staged fracturing; shale gas; pilot test
Haibang XIA , Kai BAO , Rui WANG . Pilot test of new infinite stage and full-bore sliding sleeve fracturing technology in shale gas wells[J]. Petroleum Reservoir Evaluation and Development, 2021 , 11(3) : 390 -394 . DOI: 10.13809/j.cnki.cn32-1825/te.2021.03.014
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